1 /* tc-a29k.c -- Assemble for the AMD 29000.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* John Gilmore has reorganized this module somewhat, to make it easier
21 to convert it to new machines' assemblers as desired. There was too
22 much bloody rewriting required before. There still probably is. */
27 #include "opcode/a29k.h"
29 /* Make it easier to clone this machine desc into another one. */
30 #define machine_opcode a29k_opcode
31 #define machine_opcodes a29k_opcodes
32 #define machine_ip a29k_ip
33 #define machine_it a29k_it
35 const relax_typeS md_relax_table
[] =
40 #define IMMEDIATE_BIT 0x01000000 /* Turns RB into Immediate */
41 #define ABSOLUTE_BIT 0x01000000 /* Turns PC-relative to Absolute */
42 #define CE_BIT 0x00800000 /* Coprocessor enable in LOAD */
43 #define UI_BIT 0x00000080 /* Unsigned integer in CONVERT */
45 /* handle of the OPCODE hash table */
46 static struct hash_control
*op_hash
= NULL
;
55 int reloc_offset
; /* Offset of reloc within insn */
61 static void machine_ip
PARAMS ((char *str
));
62 /* static void print_insn PARAMS ((struct machine_it *insn)); */
64 static void s_data1
PARAMS ((void));
65 static void s_use
PARAMS ((int));
71 {"align", s_align_bytes
, 4},
72 {"block", s_space
, 0},
73 {"cputype", s_ignore
, 0}, /* CPU as 29000 or 29050 */
74 {"reg", s_lsym
, 0}, /* Register equate, same as equ */
75 {"space", s_ignore
, 0}, /* Listing control */
76 {"sect", s_ignore
, 0}, /* Creation of coff sections */
78 /* We can do this right with coff. */
85 int md_short_jump_size
= 4;
86 int md_long_jump_size
= 4;
87 #if defined(BFD_HEADERS)
89 const int md_reloc_size
= RELSZ
; /* Coff headers */
91 const int md_reloc_size
= 12; /* something else headers */
94 const int md_reloc_size
= 12; /* Not bfdized*/
97 /* This array holds the chars that always start a comment. If the
98 pre-processor is disabled, these aren't very useful */
99 const char comment_chars
[] = ";";
101 /* This array holds the chars that only start a comment at the beginning of
102 a line. If the line seems to have the form '# 123 filename'
103 .line and .file directives will appear in the pre-processed output */
104 /* Note that input_file.c hand checks for '#' at the beginning of the
105 first line of the input file. This is because the compiler outputs
106 #NO_APP at the beginning of its output. */
107 /* Also note that comments like this one will always work */
108 const char line_comment_chars
[] = "#";
110 /* We needed an unused char for line separation to work around the
111 lack of macros, using sed and such. */
112 const char line_separator_chars
[] = "@";
114 /* Chars that can be used to separate mant from exp in floating point nums */
115 const char EXP_CHARS
[] = "eE";
117 /* Chars that mean this number is a floating point constant */
120 const char FLT_CHARS
[] = "rRsSfFdDxXpP";
122 /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
123 changed in read.c. Ideally it shouldn't have to know about it at
124 all, but nothing is ideal around here. */
126 static unsigned char octal
[256];
127 #define isoctal(c) octal[c]
128 static unsigned char toHex
[256];
131 * anull bit - causes the branch delay slot instructions to not be executed
133 #define ANNUL (1 << 29)
141 if (strncmp (input_line_pointer
, ".text", 5) == 0)
143 input_line_pointer
+= 5;
147 if (strncmp (input_line_pointer
, ".data", 5) == 0)
149 input_line_pointer
+= 5;
153 if (strncmp (input_line_pointer
, ".data1", 6) == 0)
155 input_line_pointer
+= 6;
159 /* Literals can't go in the text segment because you can't read from
160 instruction memory on some 29k's. So, into initialized data. */
161 if (strncmp (input_line_pointer
, ".lit", 4) == 0)
163 input_line_pointer
+= 4;
164 subseg_set (SEG_DATA
, 200);
165 demand_empty_rest_of_line ();
169 as_bad ("Unknown segment type");
170 demand_empty_rest_of_line ();
176 subseg_set (SEG_DATA
, 1);
177 demand_empty_rest_of_line ();
180 #endif /* OBJ_COFF */
182 /* Install symbol definition that maps REGNAME to REGNO.
183 FIXME-SOON: These are not recognized in mixed case. */
186 insert_sreg (regname
, regnum
)
190 /* FIXME-SOON, put something in these syms so they won't be output
191 to the symbol table of the resulting object file. */
193 /* Must be large enough to hold the names of the special registers. */
197 symbol_table_insert (symbol_new (regname
, SEG_REGISTER
, (valueT
) regnum
,
198 &zero_address_frag
));
199 for (i
= 0; regname
[i
]; i
++)
200 buf
[i
] = islower (regname
[i
]) ? toupper (regname
[i
]) : regname
[i
];
203 symbol_table_insert (symbol_new (buf
, SEG_REGISTER
, (valueT
) regnum
,
204 &zero_address_frag
));
207 /* Install symbol definitions for assorted special registers.
208 See ASM29K Ref page 2-9. */
215 /* Protected special-purpose register names */
216 insert_sreg ("vab", SREG
+ 0);
217 insert_sreg ("ops", SREG
+ 1);
218 insert_sreg ("cps", SREG
+ 2);
219 insert_sreg ("cfg", SREG
+ 3);
220 insert_sreg ("cha", SREG
+ 4);
221 insert_sreg ("chd", SREG
+ 5);
222 insert_sreg ("chc", SREG
+ 6);
223 insert_sreg ("rbp", SREG
+ 7);
224 insert_sreg ("tmc", SREG
+ 8);
225 insert_sreg ("tmr", SREG
+ 9);
226 insert_sreg ("pc0", SREG
+ 10);
227 insert_sreg ("pc1", SREG
+ 11);
228 insert_sreg ("pc2", SREG
+ 12);
229 insert_sreg ("mmu", SREG
+ 13);
230 insert_sreg ("lru", SREG
+ 14);
232 /* Additional protected special-purpose registers for the 29050 */
233 insert_sreg ("rsn", SREG
+ 15);
234 insert_sreg ("rma0", SREG
+ 16);
235 insert_sreg ("rmc0", SREG
+ 17);
236 insert_sreg ("rma1", SREG
+ 18);
237 insert_sreg ("rmc1", SREG
+ 19);
238 insert_sreg ("spc0", SREG
+ 20);
239 insert_sreg ("spc1", SREG
+ 21);
240 insert_sreg ("spc2", SREG
+ 22);
241 insert_sreg ("iba0", SREG
+ 23);
242 insert_sreg ("ibc0", SREG
+ 24);
243 insert_sreg ("iba1", SREG
+ 25);
244 insert_sreg ("ibc1", SREG
+ 26);
246 /* Unprotected special-purpose register names */
247 insert_sreg ("ipc", SREG
+ 128);
248 insert_sreg ("ipa", SREG
+ 129);
249 insert_sreg ("ipb", SREG
+ 130);
250 insert_sreg ("q", SREG
+ 131);
251 insert_sreg ("alu", SREG
+ 132);
252 insert_sreg ("bp", SREG
+ 133);
253 insert_sreg ("fc", SREG
+ 134);
254 insert_sreg ("cr", SREG
+ 135);
255 insert_sreg ("fpe", SREG
+ 160);
256 insert_sreg ("inte", SREG
+ 161);
257 insert_sreg ("fps", SREG
+ 162);
258 /* "", SREG+163); Reserved */
259 insert_sreg ("exop", SREG
+ 164);
262 /* This function is called once, at assembler startup time. It should
263 set up all the tables, etc., that the MD part of the assembler will
268 register const char *retval
= NULL
;
270 register int skipnext
= 0;
271 register unsigned int i
;
272 register char *strend
, *strend2
;
274 /* Hash up all the opcodes for fast use later. */
276 op_hash
= hash_new ();
278 for (i
= 0; i
< num_opcodes
; i
++)
280 const char *name
= machine_opcodes
[i
].name
;
288 /* Hack to avoid multiple opcode entries. We pre-locate all the
289 variations (b/i field and P/A field) and handle them. */
291 if (!strcmp (name
, machine_opcodes
[i
+ 1].name
))
293 if ((machine_opcodes
[i
].opcode
& 0x01000000) != 0
294 || (machine_opcodes
[i
+ 1].opcode
& 0x01000000) == 0
295 || ((machine_opcodes
[i
].opcode
| 0x01000000)
296 != machine_opcodes
[i
+ 1].opcode
))
298 strend
= machine_opcodes
[i
].args
+ strlen (machine_opcodes
[i
].args
) - 1;
299 strend2
= machine_opcodes
[i
+ 1].args
+ strlen (machine_opcodes
[i
+ 1].args
) - 1;
312 fprintf (stderr
, "internal error: can't handle opcode %s\n",
317 /* OK, this is an i/b or A/P pair. We skip the
318 higher-valued one, and let the code for operand checking
319 handle OR-ing in the bit. */
323 retval
= hash_insert (op_hash
, name
, (PTR
) &machine_opcodes
[i
]);
326 fprintf (stderr
, "internal error: can't hash `%s': %s\n",
327 machine_opcodes
[i
].name
, retval
);
333 as_fatal ("Broken assembler. No assembly attempted.");
335 for (i
= '0'; i
< '8'; ++i
)
337 for (i
= '0'; i
<= '9'; ++i
)
339 for (i
= 'a'; i
<= 'f'; ++i
)
340 toHex
[i
] = i
+ 10 - 'a';
341 for (i
= 'A'; i
<= 'F'; ++i
)
342 toHex
[i
] = i
+ 10 - 'A';
352 /* Assemble a single instruction. Its label has already been handled
353 by the generic front end. We just parse opcode and operands, and
354 produce the bytes of data and relocation. */
365 /* put out the opcode */
366 md_number_to_chars (toP
, the_insn
.opcode
, 4);
368 /* put out the symbol-dependent stuff */
369 if (the_insn
.reloc
!= NO_RELOC
)
371 fix_new_exp (frag_now
,
372 (toP
- frag_now
->fr_literal
+ the_insn
.reloc_offset
),
381 parse_operand (s
, operandp
)
383 expressionS
*operandp
;
385 char *save
= input_line_pointer
;
388 input_line_pointer
= s
;
389 expression (operandp
);
390 if (operandp
->X_op
== O_absent
)
391 as_bad ("missing operand");
392 new = input_line_pointer
;
393 input_line_pointer
= save
;
397 /* Instruction parsing. Takes a string containing the opcode.
398 Operands are at input_line_pointer. Output is in the_insn.
399 Warnings or errors are generated. */
407 struct machine_opcode
*insn
;
409 unsigned long opcode
;
410 expressionS the_operand
;
411 expressionS
*operand
= &the_operand
;
414 /* Must handle `div0' opcode. */
417 for (; isalnum (*s
); ++s
)
426 case ' ': /* FIXME-SOMEDAY more whitespace */
431 as_bad ("Unknown opcode: `%s'", str
);
434 if ((insn
= (struct machine_opcode
*) hash_find (op_hash
, str
)) == NULL
)
436 as_bad ("Unknown opcode `%s'.", str
);
440 opcode
= insn
->opcode
;
441 memset (&the_insn
, '\0', sizeof (the_insn
));
442 the_insn
.reloc
= NO_RELOC
;
444 /* Build the opcode, checking as we go to make sure that the
447 If an operand matches, we modify the_insn or opcode appropriately,
448 and do a "continue". If an operand fails to match, we "break". */
450 if (insn
->args
[0] != '\0')
451 s
= parse_operand (s
, operand
); /* Prime the pump */
453 for (args
= insn
->args
;; ++args
)
458 case '\0': /* end of args */
461 /* We are truly done. */
462 the_insn
.opcode
= opcode
;
465 as_bad ("Too many operands: %s", s
);
468 case ',': /* Must match a comma */
471 s
= parse_operand (s
, operand
); /* Parse next opnd */
476 case 'v': /* Trap numbers (immediate field) */
477 if (operand
->X_op
== O_constant
)
479 if (operand
->X_add_number
< 256)
481 opcode
|= (operand
->X_add_number
<< 16);
486 as_bad ("Immediate value of %ld is too large",
487 (long) operand
->X_add_number
);
491 the_insn
.reloc
= RELOC_8
;
492 the_insn
.reloc_offset
= 1; /* BIG-ENDIAN Byte 1 of insn */
493 the_insn
.exp
= *operand
;
496 case 'b': /* A general register or 8-bit immediate */
498 /* We treat the two cases identically since we mashed
499 them together in the opcode table. */
500 if (operand
->X_op
== O_register
)
503 /* Make sure the 'i' case really exists. */
504 if ((insn
->opcode
| IMMEDIATE_BIT
) != (insn
+ 1)->opcode
)
507 opcode
|= IMMEDIATE_BIT
;
508 if (operand
->X_op
== O_constant
)
510 if (operand
->X_add_number
< 256)
512 opcode
|= operand
->X_add_number
;
517 as_bad ("Immediate value of %ld is too large",
518 (long) operand
->X_add_number
);
522 the_insn
.reloc
= RELOC_8
;
523 the_insn
.reloc_offset
= 3; /* BIG-ENDIAN Byte 3 of insn */
524 the_insn
.exp
= *operand
;
527 case 'a': /* next operand must be a register */
530 /* lrNNN or grNNN or %%expr or a user-def register name */
531 if (operand
->X_op
!= O_register
)
532 break; /* Only registers */
533 know (operand
->X_add_symbol
== 0);
534 know (operand
->X_op_symbol
== 0);
535 reg
= operand
->X_add_number
;
537 break; /* No special registers */
539 /* Got the register, now figure out where it goes in the
556 as_fatal ("failed sanity check.");
559 case 'x': /* 16 bit constant, zero-extended */
560 case 'X': /* 16 bit constant, one-extended */
561 if (operand
->X_op
== O_constant
)
563 opcode
|= (operand
->X_add_number
& 0xFF) << 0 |
564 ((operand
->X_add_number
& 0xFF00) << 8);
567 the_insn
.reloc
= RELOC_CONST
;
568 the_insn
.exp
= *operand
;
572 if (operand
->X_op
== O_constant
)
574 opcode
|= (operand
->X_add_number
& 0x00FF0000) >> 16 |
575 (((unsigned long) operand
->X_add_number
576 /* avoid sign ext */ & 0xFF000000) >> 8);
579 the_insn
.reloc
= RELOC_CONSTH
;
580 the_insn
.exp
= *operand
;
583 case 'P': /* PC-relative jump address */
584 case 'A': /* Absolute jump address */
585 /* These two are treated together since we folded the
586 opcode table entries together. */
587 if (operand
->X_op
== O_constant
)
589 /* Make sure the 'A' case really exists. */
590 if ((insn
->opcode
| ABSOLUTE_BIT
) != (insn
+ 1)->opcode
)
592 opcode
|= ABSOLUTE_BIT
|
593 (operand
->X_add_number
& 0x0003FC00) << 6 |
594 ((operand
->X_add_number
& 0x000003FC) >> 2);
597 the_insn
.reloc
= RELOC_JUMPTARG
;
598 the_insn
.exp
= *operand
;
599 the_insn
.pcrel
= 1; /* Assume PC-relative jump */
600 /* FIXME-SOON, Do we figure out whether abs later, after
604 case 'e': /* Coprocessor enable bit for LOAD/STORE insn */
605 if (operand
->X_op
== O_constant
)
607 if (operand
->X_add_number
== 0)
609 if (operand
->X_add_number
== 1)
617 case 'n': /* Control bits for LOAD/STORE instructions */
618 if (operand
->X_op
== O_constant
&&
619 operand
->X_add_number
< 128)
621 opcode
|= (operand
->X_add_number
<< 16);
626 case 's': /* Special register number */
627 if (operand
->X_op
!= O_register
)
628 break; /* Only registers */
629 if (operand
->X_add_number
< SREG
)
630 break; /* Not a special register */
631 opcode
|= (operand
->X_add_number
& 0xFF) << 8;
634 case 'u': /* UI bit of CONVERT */
635 if (operand
->X_op
== O_constant
)
637 if (operand
->X_add_number
== 0)
639 if (operand
->X_add_number
== 1)
647 case 'r': /* RND bits of CONVERT */
648 if (operand
->X_op
== O_constant
&&
649 operand
->X_add_number
< 8)
651 opcode
|= operand
->X_add_number
<< 4;
656 case 'd': /* FD bits of CONVERT */
657 if (operand
->X_op
== O_constant
&&
658 operand
->X_add_number
< 4)
660 opcode
|= operand
->X_add_number
<< 2;
666 case 'f': /* FS bits of CONVERT */
667 if (operand
->X_op
== O_constant
&&
668 operand
->X_add_number
< 4)
670 opcode
|= operand
->X_add_number
<< 0;
676 if (operand
->X_op
== O_constant
&&
677 operand
->X_add_number
< 4)
679 opcode
|= operand
->X_add_number
<< 16;
685 if (operand
->X_op
== O_constant
&&
686 operand
->X_add_number
< 16)
688 opcode
|= operand
->X_add_number
<< 18;
696 /* Types or values of args don't match. */
697 as_bad ("Invalid operands");
702 /* This is identical to the md_atof in m68k.c. I think this is right,
705 Turn a string in input_line_pointer into a floating point constant
706 of type type, and store the appropriate bytes in *litP. The number
707 of LITTLENUMS emitted is stored in *sizeP . An error message is
708 returned, or NULL on OK. */
710 /* Equal to MAX_PRECISION in atof-ieee.c */
711 #define MAX_LITTLENUMS 6
714 md_atof (type
, litP
, sizeP
)
720 LITTLENUM_TYPE words
[MAX_LITTLENUMS
];
721 LITTLENUM_TYPE
*wordP
;
753 return "Bad call to MD_ATOF()";
755 t
= atof_ieee (input_line_pointer
, type
, words
);
757 input_line_pointer
= t
;
758 *sizeP
= prec
* sizeof (LITTLENUM_TYPE
);
759 for (wordP
= words
; prec
--;)
761 md_number_to_chars (litP
, (valueT
) (*wordP
++), sizeof (LITTLENUM_TYPE
));
762 litP
+= sizeof (LITTLENUM_TYPE
);
768 * Write out big-endian.
771 md_number_to_chars (buf
, val
, n
)
776 number_to_chars_bigendian (buf
, val
, n
);
780 md_apply_fix (fixP
, val
)
784 char *buf
= fixP
->fx_where
+ fixP
->fx_frag
->fr_literal
;
786 fixP
->fx_addnumber
= val
; /* Remember value for emit_reloc */
789 know (fixP
->fx_size
== 4);
790 know (fixP
->fx_r_type
< NO_RELOC
);
792 /* This is a hack. There should be a better way to handle this. */
793 if (fixP
->fx_r_type
== RELOC_WDISP30
&& fixP
->fx_addsy
)
795 val
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
798 switch (fixP
->fx_r_type
)
813 val
= (val
>>= 2) + 1;
814 buf
[0] |= (val
>> 24) & 0x3f;
815 buf
[1] = (val
>> 16);
821 buf
[1] |= (val
>> 26) & 0x3f;
827 buf
[2] |= (val
>> 8) & 0x03;
832 buf
[2] |= (val
>> 8) & 0x1f;
837 val
= (val
>>= 2) + 1;
840 buf
[1] |= (val
>> 16) & 0x3f;
854 case RELOC_JUMPTARG
: /* 00XX00XX pattern in a word */
855 buf
[1] = val
>> 10; /* Holds bits 0003FFFC of address */
859 case RELOC_CONST
: /* 00XX00XX pattern in a word */
860 buf
[1] = val
>> 8; /* Holds bits 0000XXXX */
864 case RELOC_CONSTH
: /* 00XX00XX pattern in a word */
865 buf
[1] = val
>> 24; /* Holds bits XXXX0000 */
871 as_bad ("bad relocation type: 0x%02x", fixP
->fx_r_type
);
878 tc_coff_fix2rtype (fixP
)
882 switch (fixP
->fx_r_type
)
895 printf ("need %o3\n", fixP
->fx_r_type
);
897 } /* switch on type */
902 #endif /* OBJ_COFF */
904 /* should never be called for 29k */
906 md_create_short_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
908 addressT from_addr
, to_addr
;
912 as_fatal ("a29k_create_short_jmp\n");
915 /* should never be called for 29k */
917 md_convert_frag (headers
, fragP
)
918 object_headers
*headers
;
919 register fragS
*fragP
;
921 as_fatal ("a29k_convert_frag\n");
924 /* should never be called for 29k */
926 md_create_long_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
933 as_fatal ("a29k_create_long_jump\n");
936 /* should never be called for a29k */
938 md_estimate_size_before_relax (fragP
, segtype
)
939 register fragS
*fragP
;
942 as_fatal ("a29k_estimate_size_before_relax\n");
947 /* for debugging only */
950 struct machine_it
*insn
;
983 fprintf (stderr
, "ERROR: %s\n");
985 fprintf (stderr
, "opcode=0x%08x\n", insn
->opcode
);
986 fprintf (stderr
, "reloc = %s\n", Reloc
[insn
->reloc
]);
987 fprintf (stderr
, "exp = {\n");
988 fprintf (stderr
, "\t\tX_add_symbol = %s\n",
989 insn
->exp
.X_add_symbol
?
990 (S_GET_NAME (insn
->exp
.X_add_symbol
) ?
991 S_GET_NAME (insn
->exp
.X_add_symbol
) : "???") : "0");
992 fprintf (stderr
, "\t\tX_op_symbol = %s\n",
993 insn
->exp
.X_op_symbol
?
994 (S_GET_NAME (insn
->exp
.X_op_symbol
) ?
995 S_GET_NAME (insn
->exp
.X_op_symbol
) : "???") : "0");
996 fprintf (stderr
, "\t\tX_add_number = %d\n",
997 insn
->exp
.X_add_number
);
998 fprintf (stderr
, "}\n");
1003 /* Translate internal representation of relocation info to target format.
1005 On sparc/29k: first 4 bytes are normal unsigned long address, next three
1006 bytes are index, most sig. byte first. Byte 7 is broken up with
1007 bit 7 as external, bits 6 & 5 unused, and the lower
1008 five bits as relocation type. Next 4 bytes are long addend. */
1009 /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */
1014 tc_aout_fix_to_chars (where
, fixP
, segment_address_in_file
)
1017 relax_addressT segment_address_in_file
;
1021 know (fixP
->fx_r_type
< NO_RELOC
);
1022 know (fixP
->fx_addsy
!= NULL
);
1024 md_number_to_chars (where
,
1025 fixP
->fx_frag
->fr_address
+ fixP
->fx_where
- segment_address_in_file
,
1028 r_symbolnum
= (S_IS_DEFINED (fixP
->fx_addsy
)
1029 ? S_GET_TYPE (fixP
->fx_addsy
)
1030 : fixP
->fx_addsy
->sy_number
);
1032 where
[4] = (r_symbolnum
>> 16) & 0x0ff;
1033 where
[5] = (r_symbolnum
>> 8) & 0x0ff;
1034 where
[6] = r_symbolnum
& 0x0ff;
1035 where
[7] = (((!S_IS_DEFINED (fixP
->fx_addsy
)) << 7) & 0x80) | (0 & 0x60) | (fixP
->fx_r_type
& 0x1F);
1037 md_number_to_chars (&where
[8], fixP
->fx_addnumber
, 4);
1040 #endif /* OBJ_AOUT */
1043 md_parse_option (argP
, cntP
, vecP
)
1052 /* Default the values of symbols known that should be "predefined". We
1053 don't bother to predefine them unless you actually use one, since there
1054 are a lot of them. */
1057 md_undefined_symbol (name
)
1061 char testbuf
[5 + /*SLOP*/ 5];
1063 if (name
[0] == 'g' || name
[0] == 'G' || name
[0] == 'l' || name
[0] == 'L')
1065 /* Perhaps a global or local register name */
1066 if (name
[1] == 'r' || name
[1] == 'R')
1068 /* Parse the number, make sure it has no extra zeroes or trailing
1070 regnum
= atol (&name
[2]);
1073 sprintf (testbuf
, "%ld", regnum
);
1074 if (strcmp (testbuf
, &name
[2]) != 0)
1075 return 0; /* gr007 or lr7foo or whatever */
1077 /* We have a wiener! Define and return a new symbol for it. */
1078 if (name
[0] == 'l' || name
[0] == 'L')
1080 return (symbol_new (name
, SEG_REGISTER
, (valueT
) regnum
,
1081 &zero_address_frag
));
1088 /* Parse an operand that is machine-specific. */
1091 md_operand (expressionP
)
1092 expressionS
*expressionP
;
1095 if (input_line_pointer
[0] == '%' && input_line_pointer
[1] == '%')
1097 /* We have a numeric register expression. No biggy. */
1098 input_line_pointer
+= 2; /* Skip %% */
1099 (void) expression (expressionP
);
1100 if (expressionP
->X_op
!= O_constant
1101 || expressionP
->X_add_number
> 255)
1102 as_bad ("Invalid expression after %%%%\n");
1103 expressionP
->X_op
= O_register
;
1105 else if (input_line_pointer
[0] == '&')
1107 /* We are taking the 'address' of a register...this one is not
1108 in the manual, but it *is* in traps/fpsymbol.h! What they
1109 seem to want is the register number, as an absolute number. */
1110 input_line_pointer
++; /* Skip & */
1111 (void) expression (expressionP
);
1112 if (expressionP
->X_op
!= O_register
)
1113 as_bad ("Invalid register in & expression");
1115 expressionP
->X_op
= O_constant
;
1119 /* Round up a section size to the appropriate boundary. */
1121 md_section_align (segment
, size
)
1125 return size
; /* Byte alignment is fine */
1128 /* Exactly what point is a PC-relative offset relative TO?
1129 On the 29000, they're relative to the address of the instruction,
1130 which we have set up as the address of the fixup too. */
1132 md_pcrel_from (fixP
)
1135 return fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
1138 /* end of tc-a29k.c */